Paper-bag machine



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W. C. CROSS. Paper Bag Machine No. 239,455 Patented March 29,1881.

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W. C. GROSS.

Paper Bag Machine No. 239,455. Patented March 29,1881.

' N. PETERS. FHOTO-LIYHOGRAFME, WASHINGTON, D C.

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W. C. GROSS.

y Paper Bag Machine No. 239,455. A Patented Mar-ch 29,1881.

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-ATnNr l FFTCEG WILLIAM O. OROSS,'OF BOSTON, MASSACHUSETTS.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 239,455, dated March 29, 1-881. Application tiled December 15, ISEO. (No model.)

To a/Z 'whom 'it may concern:

Be it known that I, WILLIAM G. Uaoss, of Boston, Massachusetts, have invented certain new and useful'lmprovements in Machinery for Making Satchel-Bottom Paper Bags, of which the following is a specification.

My present improvements have reference to that portion of said machinery by Which the second and the iinal folds of the Satchel-bottom are made, the first or diamond fold having previously been made by appropriate known means; and they particularly relate to the method of and means for making the final fold.

The principal feature of my said improvements resides in a method of making the final fold, which consists in first folding back-the front iiap of the diamond fold to form the second fold, the bag-blank traveling Satchel-bottom end foremost, then reversing the whole bag to bring its mouth end foremost and the rear iiap of the diamond fold to the front relatively to the direction of feed, then folding back this iiap to form the iinal fold of the Satchel-bottom, and subsequently discharging the completed bag. The principal co-operating elements of the machinery by which the whole bag is thus reversed and the final fold made are a rotating reversing-roll, which receives and is provided with means to retain the folded front end of the Satchel-bottom, and a rotating reversing-bar, which travels in the same direction with, but at stated intervals ata greater speed than, the reversing-roll, and Wipes against and acts to carry forward around said reversing-roll the body of the bag, so as to bring its mouth end foremost. One of these instrumentalities-the reversing-roll--I can make use of without the reversing-bar, in order .to partially reverse the bag and make the [in al fold, by making at the same time a blind fold in the body of the bag, as will be hereinafter described.

The nature of my improvement and the manner in which the same is or maybe carried into effect can best be explained and understood by reference to the accompanying drawings, in which- Figure l is a longitudinal vertical central section, partly in elevation, of a Satchel-bottom-paper-bag machine containing my im-4 provements, only so much of the machine being represented as needed for the purposes of hub, together with a portion of the rotary shaft,

which it looselyencircles. Figs. 6, 7, and 8 are diagrammatic views representing the revers-4 ingroll, nipper, and reversing-bar in positions which they respectively assumeduring a revolution of the roll. Fig. 9 is a perspective View of the third folder detached. Fig. l0 is a perspective view of the nipper detached. Fig. ll is a side elevation of a modification of the nipper-actuatin g cam. Figs. l2 to 17, inclusive, represent modifications hereinafter lnore particularly referred to.

The parts of the machine are supported in a frame, A, of suitable construction.

T e carrier, which carries forward the blank while the second fold is hein g made, is similar to the carrier described in several of my recent Letters Patent-c. g., Letters Patent No 222,465, dated December 91879-consisting of carrying-tapes O, passing around rolls a d, and apron D, passing around rolls g t', and foldin g-roll B. This carrier is arranged and ,operates substantially as described in my aforesaid Letters Patent.

E are folders, which may be movable, as described in my Letters Patent No. 222,465, but are here shown as stationary, and act to fold back the frontpoint or iiap, j", of diamond fold of the blank f, as indicated in Fig. 1, thus forming the second fold, which is pressed down by the final rolls d z' as it passes between them. Before the diamond-folded blank reaches the carrier it passes between rolls F G, the upper one of which is provided with paste-ridges G', which deposit the usual parallel lines of paste upon the diamond fold. The paste is supplied to the ridges from the paste-trough Gr4 through the intermediary of rolls Gr2 G3, in the usual way.

` Upon each end ofthe roll d is acam, d', the periphery of which runs in contact with an an'- nular rim, if, of roll i, the object of this arrangement being to separate the tape-carryin g roll d from the apron-carryin g roll z' at stated intervals, for purposes hereinafter mentioned; and to admit of this movement the upper roll, d, has its-bearing in boxes which are movable and controlled by pressure-springs d2, as will be understood without further explanation. In order that the cam d may be adjusted so as to set it to any desired position, or vary the relative length of its different surfaces, I make it, as shown in Fig. l, of two overlapping parts, movable on the shaft or axle of roll d as an axis, and united or clamped together and to the end of the roll by set-screws d3, which pass into the roll through curved slots in the cams sections.

I remark here that while I prefer the forni of carrier just described, yet carriers of other known kinds maybe employed for the purpose of delivering the partly-folded blank to the mechanism now about to be described.

Below the discharge end of the carrier, and in such position that the nipper hereinafter described will take hold on the blank passing out and down from between the nal rolls di, is the device H, which Ihave termed the reversing-roll.77 Said roll, as indicated in Fig.

' the reversing-roll.

2, is a semi-roll having its power-driven shaft H supported in proper bearings in the frame A.' In bearings on the roll is mounted the nipper I, (shownmore plainlyin Fig. 10,) having its shaft I projecting through the ends of Upon each end of the shaft is a crank-arm, b, with a roller-stud, c, which travels around a stationary cam, e, fixed to some suitable part of the machine-frame. The roller-stud is held against the periphery of the cam by a spring, h, attached at one end to arm b and at the other end to roll H.

Encirclinglyloosely the shaft H on each side of the machine is a cylindrical eccentric sleeve or boss, J, xed to the machine-frame. (See Figs. 4, 5.) O11 this boss is mounted the hub `of the revolving sector-gear K, to which is xed the device hereinbefore termed by me the reversing-bar,77 consisting of the two radial arms j (attached one to each of the eccentrically-mounted sector-gear) and the crossbar 7c. The main object of thus mounting the reversing-bar eccentrically to the reversingroll is that it may revolve Without striking against the third folder, (hereinafter referred to,) which latter device must run in yielding contact with the semi-cylindrical periphery of the reversing-roll. The cutting away of the reversing-roll is due to the eccentric placing of the reversing-bar, for were the roll not thus cut away the reversing-bar could not, of course, clear it.

The sector-gear K has the two sets of teeth Z m, and is driven by a like sector-gear, L, with corresponding sets of teeth Z m', the teeth l meshing with the teeth m', and the teeth 'm with the teeth Z. Gear L is fast on a shaft, M, which is driven from shaft H through the intermediary of pinions N N. rEhe result of this arrangement is that the reversing-bar makes one complete revolution in the same time that the reversing-roll makes one revolution; but owing to the sector-gear connection it moves 'for about two-thirds of a revolution at much greater speed than the reversing-roll, and during the remaining one-third of the revolution at a proportionately slower rate. The object of this is that the reversing-bar may whip or wipe the bag-blank around the roll, so as to bring the mouth end of the blank foremost, as will presently be described.

P is the third folder, which is hung on a rod, P', and capable of a limited oscillatory movement thereon, determined by the length of the recess or slot n iu its hub, Fig. 9, into which projects the stop-pin a on the rod P. Asprin g, o, presses the folder forward, so that it will bear with yielding pressure against cylindrical portion of the reversing-roll.

The operation of the above-described mechanism, allv the power-driven parts of which are continuously moving, is as follows: The blanks, diamond fold uppermost, pass along through the carrier and ont from between the nal rolls d Two blanks,f, are shown in Fig. l. rEhe rear one is just about having the front point or flap, f', of its diamond fold folded back in order to form the second fold. rThe front one, with its front flap folded, has passed far enough out from between the rolls d i to meet the reversing-roll. Inthis position its partly-folded end has entered between the reversing-roll and the open nipper, as shown in Fig. 6, the reversing-bar having the position indicated by the dotted lines, and the upper part or mouth end of the blank being still held by the carrier. The body of the blank thus extends between the carrier and the reversingroll, and it is from this point that the operation will be more particularly described. The nipper now closes down on the blank, the points at which its forked front end takes hold of'the blank determining'the line of fold of the rear ilap,f2, of the diamond fold. Simultaneously the rolls l rseparate enough to release hold on the mouth end of the blank, and the reversing-bar (which is just about in contact with the body of the blank) takes up its rapid rate of rotation and wipes the blankbody forward, bringing its mouth end foremost and its rear flap, f2, to the front of the Satchel-bottom. This flap, as it passes beneath the third folder, is wiped back and pressed down by the latter, which passes between the forked end of the nipper, and the third fold is thus made, as indicated in Fig. 7. The reversing-bar, in its rapid movement, has entirely cleared the bag and occupies the position indicated by dotted lines in Fi 0, 7. From that point onward until it reaches the position indicated in Fig. 6, it moves slowly, so as to allow the nipper and reversing-roll to catch up with it. When the reversing-roll has traveled from the position shown in Fig. 7 to that shown in Fig. 8 the nipper opens and the completed bag drops from the reversing-roll into a proper receptacle, R. Further movement of III the reversing-roll brings the parts again to the proper position, as in Fig. 6, to receive the next succeeding blank.

It will thus be seen that I completely reverse the whole blank after the second and before the third or final fold is made, thus bringing each iiap successively to the front relatively to the feed, so that each may in succession be wiped back and folded down by a blade or blades or their equivalent, beneath which the blank passes, and discharging the blank mouth end foremost from the machine.

I remark that the rise on the nipper-operating cam may be formed of a stid spring, as indicated at c', Fig. l1, which will enable the nipper to accommodate itself toinequalities in the thickness of the material grasped by it.

In the fore part of this specification I have mentioned the fact that the reversing-roll can be used without the reversing-bar to partially reverse the bag and make the final fold by making at the same time a blind fold in the body of the bag. Such an arrangement is shown in side elevation in Figs. 12 and 13.

Like letters in these figures and in the iigures already described indicate corresponding parts. A

The reversing-roll here is cylindricahand is set closer to the final rolls d 't' of the carrier, a portion only of which is shown. The nipper takes the blank in the same way and at the same point as already described, and the reversing-roll carries the blank along, partly reversingit, as shown, so that in passing under the third folder, in order to make the final fold, a blind fold is made, as indicated in Fig. 12. When, afterhavingpassed the third folder, the nipper rises and releases the blank, an oscillatory knocker, S, which lies normally in a recess in the roll at a point where it will be under the part of the blank held between the nipper and the roll, is caused to suddenly protrude and to throw the blank out from beneath the nipper, as indicated in Fig. 13. The knocker is shown in plan view in Fig. 17 in p0- sition in the roll. Itis also shown detached in Fig. 15. It consists, as there shown, of a iin ger attached to an oscillatoryshaft, r, mounted properly iii the reversing-roll, and carrying at its end which protrudes therefrom two iingers, s t, which wipe against studs o fixed to the frame, and extending into their path in such manner as to throw the knocker S out from .and withdraw it into the reversing-roll at proper times. From the reversing-roll the blank may, if desired, pass down between power-driven delivery-rolls, indicated at why dotted lines in Fig. 13.

In lieu of using the stationary fingers or blades E, Figs. 1 and 2, to make the second fold, I can employ an oscillatory blade, E', as in Fig. 14, moved in one direction by a spring, zr, and inthe other direction by a pin, y, or a cam or its equivalenten each head or end of the roll g. The blade forms part of a frame shown separately in Fig. 15, which is hung onA zal suitable studs on the frame, with its ends y' in position to be acted on by the pin y, which operates to depress the blade just as the front i lia-p of the diamond has come under it to the proper extent, said iiap riding upon the idle roll z. The sudden downward movementof the blade creases the Hap and causes it, as the blank continues to move forward, to pass under and be folded back by the roll z.

I remark, in conclusion, that while I prefer to employ a nipper such as described for the purpose of retaining for the prescribed time the blank on the reversing-roll and determining the line of the last fold, yet it is manifest that other means may be employed for the purpose-as, for instance, a pocket of proper depth and shape on the reversing-roll. I do not therefore restrict myself to the particular instrumentality herein shown in illustration of my invention.

What I claim, and desire to secure by Letters Patent, is-

1. The improvement in the art of making Satchel-bottom paper bags which consists in reversing the blank while being fed along diamond fold foremost, so as to bring its mouth end-foremost before folding that iap of the diamond which overlies the body of the bagblank, substantially as hereinbefore set forth.

2. That step in the art of making satchelbottom paper bags which consists in reversing the whole bag while being fed along to bring its mouth end foremost after the second fold and before the final is made, substantially as hereinbefore set forth.

3. The improvement in the art of folding the flaps of the diamond fold of a bag-blank, in order to make the second and final folds of the satchel-bottom,which consists in first folding back the front Hap ofthe diamond fold to form the second fold, the bag-blank 'traveling diamond-folded end foremost, then reversing the whole blank so as to bring its mouth end foremost and the rear flap of the diamond fold to the front relatively to the direction of feed, then folding back this flap to form the final fold of the Satchel-bottom, and subsequently discharging the completed bag, all substantially as hereinbefore set forth.

. 4. The combination, substantially as hereinbefore set forth,of the rotating reversing-roll, means, substantially as described, carried by said roll, for receiving and retaining the front end of the partially-folded blank and determining the line of the iinalV fold, and the rotating reversing-bar. i

5. The combination, substantially as hereinbefore set forth, of the rotating reversing-roll, the nipper carried thereon and operated at stated intervals to grasp and release the blank, the rotating reversingbar, and the third folder.

6. The combination, with the carrier, of thc reversing-roll, provided with means, substantially as described, for receiving and retaining the blank delivered to it diamond-folded end ICO IIS

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foremost from the carrier, and rotated in a direetion to bring` to the front relatively to the direction of its movement that flap of the diamond which over-lies the body of the blank, substantially as hereinbefore set forth.

7. The reversing-roll and the nipper or its equivalent, as specified, in combination with the eceen trically mounted and variably speeded power-driven rotary reversing-bar, these parts being arranged and operated to move with relation to one another substantially in the mauner and for the purposes hereinbet'ore set forth.

8. The carrier operated, substantially as deseribed,to relax its hold on the blank at stated WILLIAM C. CROSS. Vitnesses:

E. A. DICK, W. C. LANE. 

